Rock core flow detection and inspection device

Abstract

The invention relates to the field of gas reservoir exploration, and discloses a core flow detection and inspection device which comprises a shell mechanism, a core holder mechanism, a confining pressure adjusting mechanism, a sealing mechanism, a control box and an adjusting valve mechanism. The confining pressure adjusting mechanism is fixedly connected to a first fixing platform and a second fixing platform of the shell mechanism, the sealing mechanism is fixedly connected to the two sides of the core holder mechanism, the control box is fixedly connected to the second fixing platform, the adjusting valve mechanism is fixedly connected to the interior of the pressure adjusting bin, and the pressure adjusting bin is fixedly connected to the pressure adjusting bin. The confining pressure is precisely regulated and controlled through the cooperation of the confining pressure regulating mechanism and the regulating valve mechanism, resources are saved, the experiment cost is reduced, the purity and consistency of fluid can be kept in an experiment, impurities or external influences possibly introduced due to frequent addition of new fluid are avoided, the experiment preparation and regulation time is shortened, and the experiment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of gas reservoir exploration, in particular to a core flow detection and testing device. Background Art

[0002] Core flow refers to the process of simulating the flow of fluids through rock samples (cores) in underground oil and gas reservoirs under laboratory conditions. This process is crucial for understanding and predicting the production capacity of oil and gas reservoirs, evaluating the effects of different fluids on rocks, and developing methods to improve oil and gas recovery. Through core flow experiments, researchers can directly observe and measure the behavior of fluids in porous media, including permeability, flow mechanisms, and interactions between fluids.

[0003] The existing core flow detection and testing devices lack sufficient flexibility and adaptability in confining pressure regulation and control, and cannot meet the needs of different types of cores and under different experimental conditions. The existing pressure regulation methods are relatively single and do not fully utilize the coordination between different equipment to achieve more efficient and accurate confining pressure regulation, resulting in large fluctuations in confining pressure, which affects the accuracy of experimental results. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a core flow detection and testing device, which has sufficient flexibility and adaptability to meet the needs of different types of cores and under different experimental conditions, more accurately control the confining pressure environment, improve the accuracy of pressure control while improving the experimental efficiency, etc., and solves the problems in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a core flow detection and inspection device, comprising a shell mechanism, a core clamp mechanism, a confining pressure regulating mechanism, a sealing mechanism, a control box and a regulating valve mechanism, wherein the core clamp mechanism is fixedly connected to the second fixed platform of the shell mechanism, the confining pressure regulating mechanism is fixedly connected to the first fixed platform and the second fixed platform, the sealing mechanism is fixedly connected to both sides of the core clamp mechanism, the control box is fixedly connected to the second fixed platform, and the regulating valve mechanism is fixedly connected inside the pressure regulating chamber;

[0008] The housing mechanism comprises a first fixed platform, a self-locking universal wheel is fixedly connected below the first fixed platform, a pillar is fixedly connected above the first fixed platform, and a second fixed platform is fixedly connected above the pillar;

[0009] The confining pressure regulating mechanism includes a motor, which is fixedly connected to a first fixed platform, and the motor is fixedly connected to a confining pressure pump through a flexible hose, and a confining pressure pipe is fixedly connected above the confining pressure pump, and a second solenoid valve is fixedly connected to the confining pressure pipe, and a first air pressure gauge is fixedly connected to the confining pressure pipe, and one side of the confining pressure pipe is fixedly connected to the pressure regulating bin, and a regulating valve mechanism is fixedly connected inside the pressure regulating bin, and a first pressure-extracting pipe is fixedly connected to the pressure regulating bin, and a first pressure-extracting solenoid valve is fixedly connected to the first pressure-extracting pipe, and a pressure-extracting pump is fixedly connected to one side of the first pressure-extracting pipe, and a first boosting pipe is fixedly connected to the pressure regulating bin, and a first boosting solenoid valve is fixedly connected to the first boosting pipe, and a booster is fixedly connected to the first boosting pipe, and the second pressure-extracting pipe is fixedly connected to the pressure pump. The second pressure extraction pipe is fixedly connected with a second pressure extraction solenoid valve, one side of the second pressure extraction pipe is fixedly connected to the gas tank, the supercharger is fixedly connected with a second boosting pipe, the second boosting pipe is fixedly connected with a second boosting solenoid valve, one side of the second boosting pipe is fixedly connected to the gas tank, a first pressure detection sensor is fixedly connected inside the pressure regulating chamber, a pneumatic cylinder is fixedly connected to the pressure regulating chamber, a second pressure gauge and a first solenoid valve are fixedly connected to the pneumatic cylinder, a piston is fixedly connected inside the pneumatic cylinder, an injection pipe is fixedly connected to the pneumatic cylinder, a third pressure gauge and an injection pipe solenoid valve are fixedly connected to the injection pipe, an injection pump is fixedly connected to one side of the injection pipe, a collecting pipe is fixedly connected to the pneumatic cylinder, and a collecting pipe solenoid valve is fixedly connected to the collecting pipe.

[0010] Preferably, the regulating valve mechanism includes a regulating valve, the regulating valve is fixedly connected to the second fixed platform and connected to the confining pressure pipe, the regulating valve is fixedly connected to a regulating solenoid valve and a rotating shaft, the regulating valve is fixedly connected to an air inlet, and the air inlet passes through the regulating valve, the top of the regulating valve is sealed, a block is fixedly connected to the inside of the regulating valve, the bottom of the block is in the middle of the air inlet, one side of the block is fixedly connected to a spring, one side of the spring is fixedly connected to the inner wall of the regulating valve, the regulating valve is fixedly connected to an air inlet, and the air inlet passes through the regulating valve, the top of the regulating valve is sealed, and the block is fixedly connected to the inside of the regulating valve The bottom of the block is in the middle of the air inlet, one side of the block is fixedly connected to a spring, one side of the spring is fixedly connected to the inner wall of the regulating valve, the rotating shaft is fixedly connected to a gear, the gear and the rack baffle are meshed, and after the rack on the rack baffle is driven by the gear to move, the baffle on the rack baffle can block the entry of nitrogen, one side of the rotating shaft is fixedly connected to an adjusting wheel, the adjusting wheel is fixedly connected to a connecting rod, one side of the connecting rod is fixedly connected to a slider, the slider is slidably connected to the first pressure extraction pipe and the first boost pipe, and the regulating valve mechanism is two on the left and right, which are respectively connected to both sides of the regulating valve.

[0011] Preferably, the suction pump and the booster in the confining pressure regulating mechanism perform confining pressure regulation through a pressure regulating chamber, and the nitrogen extracted by the suction pump is stored in a gas storage tank, and the booster boosts the nitrogen in the gas storage tank.

[0012] Preferably, the core clamp mechanism includes a first fixed block, which is fixedly connected to the second fixed platform, a core clamp is fixedly connected to the first fixed block, a telescopic rod is fixedly connected inside the core clamp, a clamping block is fixedly connected below the telescopic rod, core columns are fixedly connected inside the multiple clamping blocks for fixing the core columns, and a second pressure detection sensor is fixedly connected to the clamping block.

[0013] Preferably, the sealing mechanism includes a right fixing ring, which is fixedly connected to the core clamp mechanism, a sealing ring is fixedly connected to one side of the right fixing ring, and a left fixing ring is fixedly connected to one side of the sealing ring, and the left fixing ring and the right fixing ring are fixedly connected by a fixing nut and a fixing nut.

[0014] Preferably, the control box is fixedly connected to the second fixed platform, and the control box controls the entire work flow and steps of the core flow detection and testing device.

[0015] Preferably, the adjusting the confining pressure includes reducing the confining pressure during the experiment and increasing the confining pressure during the experiment, specifically:

[0016] Reduce the confining pressure during the experiment, specifically:

[0017] When the pressure detected by the first pressure detection sensor exceeds the preset pressure value, the opening of the regulating valve is larger at this time, and the nitrogen enters quickly. The high air pressure in the regulating valve lifts the block, and the block is forced to move upward to compress the spring, so that the air inlet is fully opened and the nitrogen enters quickly. The control box controls the suction pump to start working, and controls the opening of the first suction solenoid valve and the second suction solenoid valve. The nitrogen is slowly pumped into the gas storage tank through the second suction pipe by the suction pump. The suction pump works to pump the high pressure in the pressure regulating chamber to the low pressure in the gas storage tank, which generates an adsorption force in the direction of the suction pump. The adsorption force drives the slider in the first suction pipe to move in the direction of the suction pump. The movement of the slider drives the connecting rod to move. The movement of the connecting rod drives the adjusting wheel to rotate. The rotation of the adjusting wheel drives the rotating shaft to rotate. The rotation of the rotating shaft drives the gear on the rotating shaft to rotate , the gear and the rack baffle are meshed, the rotation of the shaft drives the gear on the shaft to rotate, the gear and the rack baffle are meshed, the rotation of the gear drives the rack on the rack baffle to move forward, the forward movement of the rack causes the rack baffle to move forward as a whole, and the baffle of the rack baffle blocks the nitrogen inlet part of the regulating valve, making the overall opening of the regulating valve smaller, the opening of the regulating valve is smaller, the pressure injection speed in the pressure regulating chamber is reduced, the air pressure is reduced, the upward pushing force on the block is reduced, the extrusion force on the spring is reduced, the block slowly falls, and slowly blocks the top of the air inlet, the nitrogen entry speed is reduced, and the first pressure detection sensor detects the pressure in the pressure regulating chamber in real time. When the pressure reaches the preset pressure range, the control box controls the first pressure extraction solenoid valve and the second pressure extraction solenoid valve to close, and controls the regulating valve to lock the current opening size;

[0018] During the experiment, the confining pressure was increased, specifically:

[0019] When the pressure detected by the first pressure detection sensor is lower than the preset pressure value, there is a problem with the pump body of the confining pressure pump or there is insufficient nitrogen in the confining pressure pump, the control box controls the supercharger to start working, and controls to open the first boost solenoid valve and the second boost solenoid valve, and the nitrogen in the gas tank enters the supercharger through the second boost pipe for boosting. The supercharger amplifies the nitrogen in the gas tank to form high pressure, and makes the high pressure amplified by the supercharger flow into the low pressure in the pressure regulating chamber through the first boost pipe. The driving force generated by the high pressure flowing into the low pressure pushes the slider in the first boost pipe to move toward the pressure regulating chamber, the movement of the slider drives the connecting rod to move, the movement of the connecting rod drives the adjusting wheel to rotate, the rotation of the adjusting wheel drives the rotating shaft to rotate, the rotation of the rotating shaft drives the gear on the rotating shaft to rotate, the gear and the rack baffle are meshed, the rotation of the gear drives the rack on the rack baffle to move backward, the backward movement of the rack causes the rack baffle to move backward as a whole, the backward movement of the rack baffle opens the nitrogen inlet of the regulating valve blocked by the baffle, so that the overall opening of the regulating valve becomes larger. Figure 14-15 As shown, the opening of the regulating valve becomes larger, the speed of nitrogen entering becomes faster, the stopper is pushed upward, the stopper is pushed upward to squeeze and compress the spring, and the pressure injection speed in the pressure regulating chamber becomes faster, thereby increasing the pressure in the pressure regulating chamber. The first pressure detection sensor detects the pressure in the pressure regulating chamber in real time. When the pressure reaches the preset pressure range, the control box controls the opening status of the first boost solenoid valve and the second boost solenoid valve and controls the regulating valve to lock the current opening size.

[0020] (III) Beneficial effects

[0021] The present invention provides a core flow detection and inspection device. The suction and pressure pump and the booster in the confining pressure regulating mechanism of the device perform confining pressure regulation through a pressure regulating chamber. The nitrogen extracted by the suction and pressure pump is stored in a gas storage tank. The booster pressurizes the nitrogen in the gas storage tank. The suction and pressure increasing processes can drive the regulating valve mechanism to move and adjust the size of the regulating valve. The pressure change information in the pressure regulating chamber is fed back to the suction and pressure pump and the booster, so that the control box can adjust the working state in time according to the feedback information to form a confining pressure control closed loop. It not only saves resources and reduces experimental costs, but also maintains the purity and consistency of the fluid in the experiment, avoids impurities or external influences that may be introduced due to frequent addition of new fluids, controls the confining pressure environment more accurately, improves the accuracy of pressure control, and improves the experimental efficiency, reduces the experiment re-doing due to unstable pressure, and further improves the efficiency of the experiment and the reliability of the data.

[0022] The confining pressure value set in the present invention is not fixed, but is adjusted and set according to different test requirements. For example, different confining pressures are required to simulate different core depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the housing mechanism and the sealing mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the core holder mechanism of the present invention;

[0026] Figure 4 It is a front view structural schematic diagram of the core clamp mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the front view of the confining pressure regulating mechanism of the present invention.

[0028] Figure 6 It is a side view structural schematic diagram of the confining pressure regulating mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the overall structure of the suction and pressure pump and the booster of the present invention;

[0030] Figure 8 It is a schematic diagram of the top view of the confining pressure regulating mechanism of the present invention;

[0031] Fig. 9 It is a schematic diagram of the cross-sectional structure of the pneumatic cylinder of the present invention;

[0032] Fig.10 This is a schematic diagram of the structure of the collecting pipe solenoid valve of the present invention;

[0033] Fig.11 This is a schematic diagram of the structure of the regulating valve mechanism of the present invention;

[0034] Fig.12 It is a schematic cross-sectional structure diagram of the regulating valve mechanism of the present invention;

[0035] Fig.13 Schematic diagram of the pressure regulating valve structure of the present invention

[0036] Fig.14 A schematic diagram showing the movement comparison of the regulating valve mechanism of the present invention;

[0037] Fig.15 This is another motion comparison schematic diagram of the regulating valve mechanism of the present invention.

[0038] In the figure:

[0039] 1. Shell mechanism; 101. First fixed platform; 102. Self-locking universal wheel; 103. Pillar; 104. Second fixed platform;

[0040] 2. Core clamp mechanism; 201. First fixing block; 202. Core clamp; 203. Core column; 204. Telescopic rod; 205. Clamp block; 206. Second pressure detection sensor;

[0041] 3. Confining pressure regulating mechanism; 301. Motor; 302. Flexible hose; 303. Confining pressure pump; 304. Confining pressure pipe; 305. First air pressure gauge; 306. Pressure regulating chamber; 307. First pressure pumping pipe; 308. First pressure pumping solenoid valve; 309. Pressure pump; 310. First boosting pipe; 311. First boosting solenoid valve; 312. Supercharger; 313. Air tank; 314. Second boosting pipe; 315. Second boosting solenoid valve valve; 316, second pumping and pressure pipe; 317, second pumping and pressure solenoid valve; 318, first pressure detection sensor; 319, pneumatic cylinder; 320, second air pressure gauge; 321, first solenoid valve; 322, injection pump; 323, injection pipe; 324, third air pressure gauge; 325, injection pipe solenoid valve; 326, collection box; 327, collection pipe; 328, collection pipe solenoid valve; 329, piston; 330, second solenoid valve;

[0042] 4. Sealing mechanism; 401. Right fixing ring; 402. Sealing ring; 403. Left fixing ring; 404. Fixing nut; 405. Fixing nut;

[0043] 5. Control box;

[0044] 6. regulating valve mechanism; 601. regulating valve; 602. regulating wheel; 603. connecting rod; 604. sliding block; 605. regulating solenoid valve; 606. rotating shaft; 607. gear; 608. rack baffle; 609. air inlet; 610. block; 611. spring. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1: A preferred embodiment of a core flow detection and testing device provided by the present invention is as follows: Figures 1 to 15 As shown: a core flow detection and testing device, including a shell mechanism 1, a core clamp mechanism 2, a confining pressure adjustment mechanism 3, a sealing mechanism 4, a control box 5 and a regulating valve mechanism 6.

[0047] like Figure 2As shown, the housing mechanism 1 includes a first fixed platform 101 , a self-locking universal wheel 102 is fixedly connected below the first fixed platform 101 , a pillar 103 is fixedly connected above the first fixed platform 101 , and a second fixed platform 104 is fixedly connected above the pillar 103 .

[0048] like Figure 5-10 As shown, the confining pressure regulating mechanism 3 includes a motor 301, which is fixedly connected to the first fixed platform 101, and the motor 301 is fixedly connected to the confining pressure pump 303 through a flexible hose 302. A confining pressure pipe 304 is fixedly connected above the confining pressure pump 303, and the confining pressure pipe 304 is fixedly connected to a second solenoid valve 330. A first air pressure gauge 305 is fixedly connected to the confining pressure pipe 304, and one side of the confining pressure pipe 304 is fixedly connected to a pressure regulating chamber 306, and a regulating valve mechanism 6 is fixedly connected inside the pressure regulating chamber 306. A first pressure-reducing pipe 307 is fixedly connected to the pressure-regulating chamber 306, a first pressure-reducing solenoid valve 308 is fixedly connected to the first pressure-reducing pipe 307, a pressure-reducing pump 309 is fixedly connected to one side of the first pressure-reducing pipe 307, a first pressure-increasing pipe 310 is fixedly connected to the pressure-regulating chamber 306, a first pressure-increasing solenoid valve 311 is fixedly connected to the first pressure-increasing pipe 310, a supercharger 312 is fixedly connected to the first pressure-increasing pipe 310, a second pressure-increasing pipe 316 is fixedly connected to the pressure-reducing pump 309, a second pressure-increasing solenoid valve 317 is fixedly connected to the second pressure-increasing pipe 316, one side of the second pressure-increasing pipe 316 is fixedly connected to the gas storage tank 313, a second pressure-increasing pipe 314 is fixedly connected to the supercharger 312, and a second pressure-increasing solenoid valve 315 is fixedly connected to the second pressure-increasing pipe 314 One side of the second boosting pipe 314 is fixedly connected to the gas storage tank 313, a first pressure detection sensor 318 is fixedly connected inside the pressure regulating chamber 306, a pneumatic cylinder 319 is fixedly connected to the pressure regulating chamber 306, a second air pressure gauge 320 and a first solenoid valve 321 are fixedly connected to the pneumatic cylinder 319, a piston 329 is fixedly connected inside the pneumatic cylinder 319, an injection pipe 323 is fixedly connected to the pneumatic cylinder 319, a third air pressure gauge 324 and an injection pipe solenoid valve 325 are fixedly connected to the injection pipe 323, an injection pump 322 is fixedly connected to one side of the injection pipe 323, a collecting pipe 327 is fixedly connected to the pneumatic cylinder 319, a collecting box 326 is fixedly connected to one side of the collecting pipe 327, and a collecting pipe solenoid valve 328 is fixedly connected to the collecting pipe 327.

[0049] like Figure 5-10As shown, the suction and pressure pump 309 and the booster 312 in the confining pressure regulating mechanism 3 control the confining pressure through the pressure regulating chamber 306, and the nitrogen extracted by the suction and pressure pump 309 is stored in the gas storage tank 313. The booster 312 pressurizes the nitrogen in the gas storage tank 313, and the suction and pressure pump 309 and the booster 312 form a confining pressure control closed loop. The confining pressure regulating mechanism 3 is divided into two left and right ones, and both are fixedly connected to the two sides of the core clamp mechanism 2. When conducting the core flow experiment, the experiment can be conducted from left to right or from right to left, which improves the accuracy and reliability of the experiment.

[0050] like Figure 11-15 As shown, the regulating valve mechanism 6 includes a regulating valve 601, which is fixedly connected to the second fixed platform 104 and connected to the confining pressure pipe 304, and a regulating solenoid valve 605 and a rotating shaft 606 are fixedly connected to the regulating valve 601. An air inlet 609 is fixedly connected to the regulating valve 601, and the air inlet 609 runs through the regulating valve 601. The top of the regulating valve 601 is blocked, and a stopper 610 is fixedly connected to the inside of the regulating valve 601. The bottom of the stopper 610 is in the middle of the air inlet 609. A spring 611 is fixedly connected to one side of the stopper 610, and one side of the spring 611 is fixedly connected to the regulating valve 60 1, a gear 607 is fixedly connected to the rotating shaft 606, and the gear 607 is meshed with the rack baffle 608. After the rack on the rack baffle 608 is driven by the gear 607 to move, the baffle on the rack baffle 608 can block the entry of nitrogen. An adjusting wheel 602 is fixedly connected to one side of the rotating shaft 606, and a connecting rod 603 is fixedly connected to the adjusting wheel 602. A slider 604 is fixedly connected to one side of the connecting rod 603. The slider 604 is slidably connected to the inside of the first pumping and pressure-reducing pipe 307 and the first boosting pipe 310. The regulating valve mechanism 6 is divided into two left and right ones, which are respectively connected to the two sides of the regulating valve 601.

[0051] The confining pressure value set in the present invention is not fixed, but is adjusted and set according to different test requirements. For example, different confining pressures are required to simulate different core depths.

[0052] like Figure 3-4 As shown, the core clamp mechanism 2 includes a first fixed block 201, which is fixedly connected to the second fixed platform 104, a core clamp 202 is fixedly connected to the first fixed block 201, a telescopic rod 204 is fixedly connected inside the core clamp 202, a clamp block 205 is fixedly connected below the telescopic rod 204, a plurality of clamp blocks 205 are fixedly connected inside with core columns 203 for fixing the core columns 203, and a second pressure detection sensor 206 is fixedly connected to the clamp block 205.

[0053] like Figure 2As shown, the sealing mechanism 4 includes a right fixing ring 401, which is fixedly connected to the core clamp mechanism 2, a sealing ring 402 is fixedly connected to one side of the right fixing ring 401, and a left fixing ring 403 is fixedly connected to one side of the sealing ring 402. The left fixing ring 403 and the right fixing ring 401 are fixedly connected by a fixing nut 404 and a fixing nut 405, and are used to seal the core clamp mechanism 2 to prevent pressure leakage and affect the test results, and the various components of the sealing mechanism 4 are detachable.

[0054] like Figure 2 As shown, the control box 5 is fixedly connected to the second fixed platform 104, and the control box 5 controls the entire work flow and steps of the core flow detection and testing device.

[0055] Example 2, based on Example 1, a preferred embodiment of a core flow detection and testing device provided by the present invention is as follows: Figures 1 to 15 As shown: a core flow detection and inspection device, the confining pressure regulating mechanism 3 detects and adjusts the confining pressure through the pressure regulating chamber 306 and the first pressure detection sensor 318 in the pressure regulating chamber 306. When the confining pressure is too high, the control box 5 extracts the excess air pressure in the pressure regulating chamber 306 through the suction pump 309, and transmits the air pressure to the air storage tank 313. During the pressure extraction process, the suction force generated by the suction pump 309 drives the regulating valve mechanism 6 to operate, and adjusts the size of the regulating valve 601 and the air intake size of the confining pressure pump 303 until the confining pressure is adjusted to the confining pressure range required by the experiment; when the confining pressure is insufficient, the control box 5 controls the supercharger 312 to increase the pressure in the pressure regulating chamber 306. During the pressure increase process, the blowing force generated by the supercharger 312 drives the regulating valve mechanism 6 to operate, and adjusts the size of the regulating valve 601 and the air intake size of the confining pressure pump 303 until the confining pressure is increased to the confining pressure range required by the experiment;

[0056] When conducting experiments on the core flow detection and inspection device, first determine the required confining pressure value according to the experimental design, and check that the experimental device is in good condition, that all valves are in a closed state and properly connected, and that the self-locking universal wheel 102 is self-locked, and the device is stabilized for the experiment;

[0057] Open the sealing mechanism 4 to install and fix the core column 203 on the core holder mechanism 2, and close the sealing mechanism 4 to ensure that the sealing is maintained during the core flow experiment to maintain the accuracy of the experiment;

[0058] The control box 5 controls the motor 301 to drive the confining pressure pump 303 to start working through the flexible hose 302, and the control box 5 controls the second solenoid valve 330 to open, and the nitrogen starts to flow out of the confining pressure pump 303 and enter the pressure regulating chamber 306 from the confining pressure pipe 304, and the first pressure detection sensor 318 in the pressure regulating chamber 306 starts to detect and regulate the confining pressure;

[0059] Reduce the confining pressure during the experiment, specifically:

[0060] When the pressure detected by the first pressure detection sensor 318 exceeds the preset pressure value, the opening of the regulating valve 601 is relatively large, and the nitrogen enters quickly. The high air pressure in the regulating valve 601 lifts the block 610, and the block 610 is forced to move upward to compress the spring 611, so that the air inlet 609 is fully opened, and the nitrogen enters quickly. The control box 5 controls the suction and pressure pump 309 to start working, and controls the opening of the first suction and pressure solenoid valve 308 and the second suction and pressure solenoid valve 317. The nitrogen is slowly pumped into the gas storage tank 313 by the suction and pressure pump 309 through the second suction and pressure pipe 316. The suction and pressure pump 309 works to pump the high pressure in the pressure regulating chamber 306 to the low pressure in the gas storage tank 313, generating a pressure pump to the suction and pressure pump 309. The adsorption force in the direction of 309 drives the slider 604 in the first suction and pressure pipe 307 to move toward the suction and pressure pump 309. The movement of the slider 604 drives the connecting rod 603 to move. The movement of the connecting rod 603 drives the adjusting wheel 602 to rotate. The rotation of the adjusting wheel 602 drives the rotating shaft 606 to rotate. The rotation of the rotating shaft 606 drives the gear 607 on the rotating shaft 606 to rotate. The gear 607 is meshed with the rack baffle 608. The rotation of the gear 607 drives the rack on the rack baffle 608 to move forward. The forward movement of the rack causes the rack baffle 608 to move forward as a whole. The baffle of the rack baffle 608 blocks the nitrogen inlet portion of the regulating valve 601, so that the overall opening of the regulating valve 601 becomes smaller. Figure 14-15 As shown, the opening of the regulating valve 601 becomes smaller, the pressure injection speed in the pressure regulating chamber 306 decreases, the air pressure decreases, the upward pushing force on the stopper 610 decreases, the extrusion force on the spring 611 decreases, the stopper 610 slowly falls, slowly blocks the top of the air inlet 609, and the pressure injection speed into the pressure regulating chamber 306 decreases. The first pressure detection sensor 318 detects the pressure in the pressure regulating chamber 306 in real time. When the pressure reaches the preset pressure range, the control box 5 controls the first pressure extraction solenoid valve 308 and the second pressure extraction solenoid valve 317 to close, and controls the regulating valve 601 to lock the current opening size;

[0061] During the experiment, the confining pressure was increased, specifically:

[0062] When the pressure detected by the first pressure detection sensor 318 is lower than the preset pressure value, there is a problem with the pump body of the confining pressure pump 303 or there is insufficient nitrogen in the confining pressure pump 303, the control box 5 controls the supercharger 312 to start working, and controls the opening of the first boost solenoid valve 311 and the second boost solenoid valve 315, and the nitrogen in the gas tank 313 enters the supercharger 312 through the second boost pipe 314 for boosting. The supercharger 312 works to amplify the nitrogen in the gas tank 313 to form high pressure, and makes the high pressure amplified by the supercharger 312 flow into the low pressure in the pressure regulating chamber 306 through the first boost pipe 310. The driving force generated by the high pressure flowing into the low pressure pushes the second boost pipe 314 to push ... The slider 604 in the boost pipe 310 moves toward the pressure regulating chamber 306, and the movement of the slider 604 drives the connecting rod 603 to move, and the movement of the connecting rod 603 drives the adjusting wheel 602 to rotate, and the rotation of the adjusting wheel 602 drives the rotating shaft 606 to rotate, and the rotation of the rotating shaft 606 drives the gear 607 on the rotating shaft 606 to rotate, and the gear 607 and the rack baffle 608 are engaged, and the rotation of the gear 607 drives the rack on the rack baffle 608 to move backward, and the backward movement of the rack causes the rack baffle 608 to move backward as a whole, and the backward movement of the rack baffle 608 opens the nitrogen inlet of the regulating valve 601 that is blocked by the baffle, so that the overall opening of the regulating valve 601 becomes larger, such as Figure 14-15 As shown, the opening of the regulating valve 601 becomes larger, the speed of nitrogen entering becomes faster, the stopper 610 is pushed upward, and the stopper 610 is pushed upward to squeeze and compress the spring 611, and the pressure injection speed in the pressure regulating chamber 306 becomes faster, thereby increasing the pressure in the pressure regulating chamber 306. The first pressure detection sensor 318 detects the pressure in the pressure regulating chamber 306 in real time. When the pressure reaches the preset pressure range, the control box 5 controls the opening state of the first boost solenoid valve 311 and the second boost solenoid valve 315 and controls the regulating valve 601 to lock the current opening size;

[0063] After the pressure is stabilized, the control box 5 controls the injection pump 322 to start working, the injection pipe solenoid valve 325 is opened, and the liquid in the injection pump 322 is injected into the pneumatic cylinder 319 through the injection pipe 323. The third barometer 324 displays the pressure of the pneumatic cylinder 319 in real time.

[0064] When the pressure in the pneumatic cylinder 319 detected by the third barometer 324 reaches a predetermined pressure value, the control box 5 controls the first solenoid valve 321 to open, and the confining pressure begins to enter the pneumatic cylinder 319, and pushes the piston 329 through the air pressure. The movement of the piston 329 pushes the liquid in the pneumatic cylinder 319 into the core clamp mechanism 2, and the core column 203 inside the core clamp mechanism 2 is injected with fluid, and the core flow performance detection begins;

[0065] During the test, the control box 5 collects and records the experimental data, and the system stores the real-time monitored and recorded data such as pressure, temperature, flow, etc.

[0066] After the core flow experiment is finished, the second solenoid valve 330 and the first solenoid valve 321 of the confining pressure regulating mechanism 3 are slowly closed, the injection pipe solenoid valve 325 is closed, and the confining pressure pump 303 and the injection pump 322 are closed, and the injection of fluid and pressure into the core clamp mechanism 2 is stopped, and the pressure change in the device is detected by the real-time coordination of the first pressure detection sensor 318 and the second pressure detection sensor 206;

[0067] The control box 5 controls the electromagnetic valve 328 of the collection pipe to open. During the operation of the core flow detection and inspection device, the liquid flowing through the core column 203 flows out at the other end of the core clamp mechanism 2. After the liquid flows into the pneumatic cylinder 319, it flows into the collection box 326 along the collection pipe 327. In this process, not only the liquid is orderly guided to the collection box 326, but also the pressure in the system is released. When the liquid flows out of the core clamp mechanism 2 and enters the pneumatic cylinder 319, as the liquid is discharged, the pressure in the core clamp mechanism 2 and related pipelines is also reduced until the pressure drops to the normal atmospheric pressure standard. The sufficiently large accommodation space of the collection box 326 and the good connectivity of the collection pipe 327 provide guarantees for the smooth discharge of the liquid and the stable release of the pressure, thereby effectively avoiding the interference of the liquid on the experiment and the pollution of the environment.

[0068] The present invention provides a core flow detection and inspection device, in which a suction pump 309 and a pressure booster 312 in a confining pressure regulating mechanism 3 of the device perform confining pressure regulation through a pressure regulating chamber 306, and the nitrogen extracted by the suction pump 309 is stored in a gas storage tank 313, and the pressure booster 312 pressurizes the nitrogen in the gas storage tank 313. The suction and pressurization processes can drive the regulating valve mechanism 6 to move, and adjust the size of the regulating valve 601, and the pressure change information in the pressure regulating chamber 306 is fed back to the suction pump 309 and the pressure booster 312, so that the control box 5 can adjust the working state in time according to the feedback information, forming a confining pressure control closed loop, which not only saves resources and reduces experimental costs, but also maintains the purity and consistency of the fluid in the experiment, avoids impurities or external influences that may be introduced due to frequent addition of new fluids, controls the confining pressure environment more accurately, improves the accuracy of pressure control, and improves the experimental efficiency, reduces the experiment re-doing due to unstable pressure, and further improves the efficiency of the experiment and the reliability of the data.

[0069] The confining pressure value set in the present invention is not fixed, but is adjusted and set according to different test requirements. For example, different confining pressures are required to simulate different core depths.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A core flow detection and testing device, comprising a housing mechanism (1), a core holder mechanism (2), a confining pressure adjustment mechanism (3), a sealing mechanism (4), a control box (5) and a regulating valve mechanism (6), characterized in that: The core clamp mechanism (2) is fixedly connected to the second fixed platform (104) of the shell mechanism (1), the confining pressure regulating mechanism (3) is fixedly connected to the first fixed platform (101) and the second fixed platform (104), the sealing mechanism (4) is fixedly connected to both sides of the core clamp mechanism (2), the control box (5) is fixedly connected to the second fixed platform (104), and the regulating valve mechanism (6) is fixedly connected inside the pressure regulating chamber (306); The housing mechanism (1) comprises a first fixed platform (101), a self-locking universal wheel (102) is fixedly connected below the first fixed platform (101), a pillar (103) is fixedly connected above the first fixed platform (101), and a second fixed platform (104) is fixedly connected above the pillar (103); The confining pressure regulating mechanism (3) comprises a motor (301), the motor (301) is fixedly connected to the first fixed platform (101), the motor (301) is fixedly connected to a confining pressure pump (303) via a flexible hose (302), a confining pressure pipe (304) is fixedly connected above the confining pressure pump (303), the confining pressure pipe (304) is fixedly connected to a second solenoid valve (330), a first air pressure gauge (305) is fixedly connected to the confining pressure pipe (304), one side of the confining pressure pipe (304) is fixedly connected to a pressure regulating chamber (306), and a regulating valve mechanism (6) is fixedly connected inside the pressure regulating chamber (306). The pressure regulating chamber (306) is fixedly connected to a first pressure extraction pipe (307), the first pressure extraction pipe (307) is fixedly connected to a first pressure extraction solenoid valve (308), one side of the first pressure extraction pipe (307) is fixedly connected to a pressure extraction pump (309), the pressure regulating chamber (306) is fixedly connected to a first pressure boosting pipe (310), the first pressure boosting pipe (310) is fixedly connected to a first pressure boosting solenoid valve (311), the first pressure boosting pipe (310) is fixedly connected to a pressure booster (312), the pressure extraction pump (309) is fixedly connected to a second pressure extraction pipe (316), the second pressure extraction pipe (316) is fixedly connected to a first pressure boosting solenoid valve (311), the first pressure boosting pipe (310) is fixedly connected to a pressure booster (312), A second pressure extraction solenoid valve (317) is fixedly connected, one side of the second pressure extraction pipe (316) is fixedly connected to the gas storage tank (313), a second pressure boosting pipe (314) is fixedly connected to the supercharger (312), a second pressure boosting solenoid valve (315) is fixedly connected to the second pressure boosting pipe (314), one side of the second pressure boosting pipe (314) is fixedly connected to the gas storage tank (313), a first pressure detection sensor (318) is fixedly connected inside the pressure regulating chamber (306), a pneumatic cylinder (319) is fixedly connected to the pressure regulating chamber (306), and a second pneumatic cylinder (319) is fixedly connected to the pneumatic cylinder (319). A pressure gauge (320) and a first solenoid valve (321) are provided in the pneumatic cylinder (319), a piston (329) is fixedly connected inside the pneumatic cylinder (319), an injection pipe (323) is fixedly connected to the pneumatic cylinder (319), a third pressure gauge (324) and an injection pipe solenoid valve (325) are fixedly connected to the injection pipe (323), an injection pump (322) is fixedly connected to one side of the injection pipe (323), a collection pipe (327) is fixedly connected to the pneumatic cylinder (319), a collection box (326) is fixedly connected to one side of the collection pipe (327), and a collection pipe solenoid valve (328) is fixedly connected to the collection pipe (327).

2. A core flow detection and testing device according to claim 1, characterized in that: The regulating valve mechanism (6) comprises a regulating valve (601), wherein the regulating valve (601) is fixedly connected to the second fixed platform (104) and connected to the confining pressure pipe (304), the regulating valve (601) is fixedly connected to a regulating solenoid valve (605) and a rotating shaft (606), the regulating valve (601) is fixedly connected to an air inlet (609), and the air inlet (609) penetrates the regulating valve (601), the top of the regulating valve (601) is sealed, a block (610) is fixedly connected to the inside of the regulating valve (601), the bottom of the block (610) is located in the middle of the air inlet (609), a spring (611) is fixedly connected to one side of the block (610), and the spring (611) is fixedly connected to the inside of the regulating valve (601), and the bottom of the block (610) is located in the middle of the air inlet (609). 11) is fixedly connected to the inner wall of the regulating valve (601) on one side, the rotating shaft (606) is fixedly connected to a gear (607), the gear (607) and the rack baffle (608) are meshed, after the rack on the rack baffle (608) is driven to move by the gear (607), the baffle on the rack baffle (608) can block the entry of nitrogen, the rotating shaft (606) is fixedly connected to an adjusting wheel (602) on one side, the adjusting wheel (602) is fixedly connected to a connecting rod (603), the connecting rod (603) is fixedly connected to a slider (604) on one side, and the slider (604) is slidably connected to the inside of the first pumping pipe (307) and the first boosting pipe (310).

3. A core flow detection and testing device according to claim 2, characterized in that: The suction pump (309) and the pressure booster (312) in the confining pressure regulating mechanism (3) perform confining pressure regulation through the pressure regulating chamber (306), and the nitrogen extracted by the suction pump (309) is stored in the gas storage tank (313), and the pressure booster (312) boosts the nitrogen in the gas storage tank (313).

4. A core flow detection and testing device according to claim 3, characterized in that: The core clamp mechanism (2) comprises a first fixed block (201), the first fixed block (201) is fixedly connected to the second fixed platform (104), a core clamp (202) is fixedly connected to the first fixed block (201), a telescopic rod (204) is fixedly connected inside the core clamp (202), a clamp block (205) is fixedly connected below the telescopic rod (204), a plurality of clamp blocks (205) are fixedly connected inside with a core column (203) for fixing the core column (203), and a second pressure detection sensor (206) is fixedly connected to the clamp block (205).

5. A core flow detection and testing device according to claim 4, characterized in that: The sealing mechanism (4) comprises a right fixing ring (401), the right fixing ring (401) is fixedly connected to the core clamp mechanism (2), one side of the right fixing ring (401) is fixedly connected to a sealing ring (402), one side of the sealing ring (402) is fixedly connected to a left fixing ring (403), and the left fixing ring (403) and the right fixing ring (401) are fixedly connected via a fixing nut (404) and a fixing nut (405).

6. A core flow detection and testing device according to claim 5, characterized in that: The control box (5) is fixedly connected to the second fixed platform (104), and the control box (5) controls the entire work process and steps of the core flow detection and testing device.

7. A core flow detection and testing device according to claim 6, characterized in that: The regulating confining pressure includes reducing the confining pressure during the experiment and increasing the confining pressure during the experiment, specifically: Reduce the confining pressure during the experiment, specifically: When the pressure detected by the first pressure detection sensor (318) exceeds the preset pressure value, the opening of the regulating valve (601) is relatively large, the nitrogen enters quickly, and the high air pressure in the regulating valve (601) lifts the stopper (610). The stopper (610) is forced to move upward to compress the extrusion spring (611), so that the air inlet (609) is fully opened, and the nitrogen enters quickly. The control box (5) controls the suction pump (309) to start working, and controls the opening of the first suction solenoid valve (308) and the second suction solenoid valve (317). The nitrogen is pumped into the suction pump (609). (309) is slowly drawn into the gas storage tank (313) through the second suction and pressure pipe (316), and the suction and pressure pump (309) works to draw the high pressure in the pressure regulating chamber (306) toward the low pressure in the gas storage tank (313), thereby generating an adsorption force in the direction of the suction and pressure pump (309), and the adsorption force drives the slider (604) in the first suction and pressure pipe (307) to move in the direction of the suction and pressure pump (309), and the movement of the slider (604) drives the connecting rod (603) to move, and the movement of the connecting rod (603) drives the adjusting wheel (602) to rotate, and the rotation of the adjusting wheel (602) drives the rotating shaft The rotating shaft (606) rotates, and the rotation of the rotating shaft (606) drives the gear (607) on the rotating shaft (606) to rotate. The gear (607) meshes with the rack baffle (608). The rotation of the gear (607) drives the rack on the rack baffle (608) to move forward. The forward movement of the rack causes the rack baffle (608) to move forward as a whole. The baffle of the rack baffle (608) blocks the nitrogen inlet of the regulating valve (601), so that the overall opening of the regulating valve (601) becomes smaller. The opening of the regulating valve (601) becomes smaller, and the pressure in the pressure regulating chamber (306) is increased. The inlet speed decreases, the air pressure decreases, the upward pushing force on the stopper (610) decreases, the squeezing force on the spring (611) decreases, the stopper (610) slowly falls, slowly blocks the top of the air inlet (609), the nitrogen inlet speed decreases, the first pressure detection sensor (318) detects the pressure in the pressure regulating chamber (306) in real time, and when the pressure reaches a preset pressure range, the control box (5) controls the first pressure extraction solenoid valve (308) and the second pressure extraction solenoid valve (317) to close, and controls the regulating valve (601) to lock the current opening size; During the experiment, the confining pressure was increased, specifically: When the pressure detected by the first pressure detection sensor (318) is lower than a preset pressure value, the pump body of the confining pressure pump (303) has a problem or the nitrogen in the confining pressure pump (303) is insufficient, the control box (5) controls the booster (312) to start working, and controls the opening of the first boosting solenoid valve (311) and the second boosting solenoid valve (315), and the nitrogen in the gas storage tank (313) enters the booster (312) through the second boosting pipe (314) for boosting. The booster (312) works to boost the nitrogen in the gas storage tank (313). The nitrogen is amplified to form a high pressure, and the high pressure amplified by the supercharger (312) flows into the low pressure in the pressure regulating chamber (306) through the first supercharging pipe (310). The driving force generated by the high pressure flowing into the low pressure pushes the slider (604) in the first supercharging pipe (310) to move toward the pressure regulating chamber (306). The movement of the slider (604) drives the connecting rod (603) to move. The movement of the connecting rod (603) drives the adjusting wheel (602) to rotate. The rotation of the adjusting wheel (602) drives the rotating shaft (606) to rotate. The rotating shaft (606) The rotation drives the gear (607) on the rotating shaft (606) to rotate, and the gear (607) meshes with the rack baffle (608). The rotation of the gear (607) drives the rack on the rack baffle (608) to move backward. The backward movement of the rack causes the rack baffle (608) to move backward as a whole. The backward movement of the rack baffle (608) opens the nitrogen inlet of the regulating valve (601) that is blocked by the baffle, so that the overall opening of the regulating valve (601) becomes larger. The opening of the regulating valve (601) becomes larger, the speed of nitrogen entering becomes faster, and the baffle (608) 10) Under the upward pushing force, the stopper (610) is pushed upward so that the spring (611) is squeezed and compressed, and the pressure injection speed in the pressure regulating chamber (306) becomes faster, thereby increasing the pressure in the pressure regulating chamber (306). The first pressure detection sensor (318) detects the pressure in the pressure regulating chamber (306) in real time. When the pressure reaches a preset pressure range, the control box (5) controls the opening state of the first boost solenoid valve (311) and the second boost solenoid valve (315) and controls the regulating valve (601) to lock the current opening size.

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